PRELAB. LAp.J ותרו) 1. How much heat is required to raise the temperature of 30.0 grams of silver from 18.2°C to 35.6°C? (the specific heat of silver is 0.226 J/g°C). A reaction of 1.00 gram of NaOH with 100 mL of 1.0 M HCl in a styrofoam calorimeter causes a 10.5°C increase in the temperature of the reaction solution. Assuming the specific heat of the solution is 4.184 J/g C, density is 1.00 g/mL, and the heat capacity of the styrofoam cup calorimeter is 10.0 J/C, calculate the heat of this reaction mole of NaOH. per AH= kJ/mol

PRELAB. LAp.J ותרו) 1. How much heat is required to raise the temperature of 30.0 grams of silver from 18.2°C to 35.6°C? (the specific heat of silver is 0.226 J/g°C). A reaction of 1.00 gram of NaOH with 100 mL of 1.0 M HCl in a styrofoam calorimeter causes a 10.5°C increase in the temperature of the reaction solution. Assuming the specific heat of the solution is 4.184 J/g C, density is 1.00 g/mL, and the heat capacity of the styrofoam cup calorimeter is 10.0 J/C, calculate the heat of this reaction mole of NaOH. per AH= kJ/mol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Please see the attached questions.
CH4 + 202 → CO₂ + 2H₂O AH-890kJ/mol How much heat is released when 2.7 g of methane gas is burned in a constant pressure system?
Simple Calorimetry. A piece of solid aluminum at 15.0°C is immersed in 12.3 g of nitrogen gas which is initially at 51.1°C and the system is allowed to equilibrate. Given that the specific heat of solid aluminum is 0.908 J/K/g and the specific heat of nitrogen gas is 1.0 J/K/g, what is the mass of the piece of solid aluminum if the final temperature is 34.7°C?
4. The reaction of 250.0 mL of a 1.00 M hydrochloric acid solution with 250.0 mL of a 1.00 M sodium hydroxide solution was carried out in a constant pressure calorimeter. The total heat capacity of the calorimeter plus solutions was 6.45 kJ/K. The temperature of the calorimeter and solutions increased by 2.11°C. What is AH (in kJ) for the neutralization of 1.00 mol HCl(aq) by NaOH(aq)? A) -54.4 B) -21.2 +12.6 +54.4 E) -12.6
2
To calibrate a calorimeter, 10.0 ml of 1.0 M NaOH and 5.0 ml of 1.0 M HCl was used in a calorimetry experiment. Which of the following will have NO EFFECT on the calculated heat capacity of the calorimeter, Ccal? a. Accidentally adding HNO3 instead of HCl. b.Adding a smaller volume of 1.0 M HCl. c.Using a bigger styrofoam ball for calibration. d.Using a wet test tube for calibration.
NW113AACE04-21 3. a hunk of metal-like substance was found in an archeological site. In an attempt to identify it, the metal was heated and placed in a calorimeter containing water and determined the specific heat of the metal. If the specific heat of the metal is 0.448 J/g °C, what is the approximate molar mass (atomic mass) and likely identity of the metal? (Hint: compare the molar mass (atomic mass) of metal that of metals in periodic table)
When 1.836 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperature of the calorimeter increases from 22.41°C to 26.63°C. If the heat capacity of the calorimeter is 4.900 kJ/°C, what is the heat of combustion of sucrose?
3. During the experiment, when calculating AH using the formula AH=C x AT, can we calculate the AH without measuring the amount of water that we put inside the calorimeter? Explain why or why not. (max of 5 sentences) 4. You accidentally forgot to measure the mass of the octane that you transferred in the crucible. You already started the calorimeter and it is too late to stop the equipment. Is it still possible to calculate the energy (in Joules) of octane? Explain.(max of 2 sentences)
When 9.1 g of a hydrocarbon is combusted in a bomb calorimeter the temperature of the calorimeter increases from 23.8 C to 53.5 C. The calorimeter contains 731 g of water and the heat capacity of the bomb is 872 J/ C. Please calculate q rxn, in kJ, for the combustion of the hydrocarbon.
1. How many joules of energy would be required to raise the temperature of 3.2 grams of mercury 4.2°C? The specific heat of mercury is 0.14 J/(g.°C).
8. Select the endothermic reaction. A) B) C) CH4(s) + O2(g) → CO>(g) + 2 H,0(1) + 890 kJ 2 HC1(g) + 185 kJ → H2(g) + 2 C2(g) 4 NH3(g) + 5 O2(g) → 4 NO (g) + 6 H2O(1) AH=-1169 kJ None of the reactions are endothermic D)